Mercurial > sdl-ios-xcode
view src/audio/mint/SDL_mintaudio_dma8.h @ 4168:69bcba65c388 SDL-1.2
Fixed bug #526
Comment #1 From Simon Howard 2009-03-20 16:50:56
Hi,
I'm the author of Chocolate Doom, one of the other source ports that James
mentioned. This is a patch against the current SVN version of SDL 1.2 that
fixes the bug. It has been tested and hopefully should be obviously correct
from examining the changes. I'll give a brief explanation.
When the palette is set with SDL_SetPalette, the IDirectDrawPalette_SetEntries
DirectX function is invoked. However, when this happens, a WM_PALETTECHANGED
message is sent to the window.
A WM_PALETTECHANGED message can also be received if the palette is changed for
some other reason, like if the system palette is changed. Therefore, the
palette change handler (DX5_PaletteChanged) has code to deal with this case.
It distinguishes "expected" palette changes (set with SDL_SetPalette) from
"unexpected" palette changes using the colorchange_expected variable, which is
set before calling IDirectDrawPalette_SetEntries. However, the code to set
this variable is missing in the fullscreen code path. By setting this
variable, the palette change is handled properly and the freezes go away.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 13 Apr 2009 00:53:12 +0000 |
parents | a1b03ba2fcd0 |
children |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" /* DMA 8bits and Falcon Codec audio definitions Patrice Mandin, Didier Méquignon */ #ifndef _SDL_mintaudio_dma8_h #define _SDL_mintaudio_dma8_h #define DMAAUDIO_IO_BASE (0xffff8900) struct DMAAUDIO_IO_S { unsigned char int_ctrl; unsigned char control; unsigned char dummy1; unsigned char start_high; unsigned char dummy2; unsigned char start_mid; unsigned char dummy3; unsigned char start_low; unsigned char dummy4; unsigned char cur_high; unsigned char dummy5; unsigned char cur_mid; unsigned char dummy6; unsigned char cur_low; unsigned char dummy7; unsigned char end_high; unsigned char dummy8; unsigned char end_mid; unsigned char dummy9; unsigned char end_low; unsigned char dummy10[12]; unsigned char track_ctrl; /* CODEC only */ unsigned char sound_ctrl; unsigned short sound_data; unsigned short sound_mask; unsigned char dummy11[10]; unsigned short dev_ctrl; unsigned short dest_ctrl; unsigned short sync_div; unsigned char track_rec; unsigned char adderin_input; unsigned char channel_input; unsigned char channel_amplification; unsigned char channel_reduction; unsigned char dummy12[6]; unsigned char data_direction; unsigned char dummy13; unsigned char dev_data; }; #define DMAAUDIO_IO ((*(volatile struct DMAAUDIO_IO_S *)DMAAUDIO_IO_BASE)) #endif /* _SDL_mintaudio_dma8_h */